摘要
采用扫描电镜(SEM)、背散射电子衍射分析技术(EBSD)等方法分析不同温度固溶处理(1090℃,1100℃)的Inconel690合金微观组织,并用恒变形方法研究了该Inconel 690合金在含Pb氢氧化钠溶液中的应力腐蚀行为。结果表明,固溶处理温度1100℃的试验合金具有更好的组织均匀性,低重合点阵晶界所占比例更高。固溶处理温度1090℃的试验合金在含Pb氢氧化钠溶液中具有更强的应力腐蚀敏感性。综合分析试验结果,较低的固溶处理温度导致690合金的低重合点阵晶界所占比例低,增加了其在含Pb氢氧化钠溶液中的应力腐蚀敏感性。
Microstructure of alloy 690 solid-solutioned at different temperatures was investigated by SEM and EBSD technique. The stress corrosion behavior of alloy 690 in NaOH solution containing Pb was studied by a constant strain method. SEM and EBSD results show that the microstructure of alloy 690 solutioned at 1100 ℃ is more uniform. Alloy 690 mill treated at 1100 ℃ has the higher proportion of low coincidence site lattice grain boundaries. The results of stress corrosion test at high temperature and high pressure condition show that alloy 690 treated at 1090℃ exhibits higher stress corrosion sensitivity in the test solution. The alloy 690 solution-treated at the lower temperature has the lower proportion of low coincidence site lattice grain boundaries,which increases the stress corrosion sensitivity in NaOH solution containing Pb.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2013年第10期38-42,共5页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(钢铁联合研究基金)(U1260201)
国家高技术研究发展计划(863)(2012AA050901)
作者简介
李成涛（1980-），男，高级工程师，从事核电材料的腐蚀性能研究，发表论文10余篇，电话：0512-68601473，E-mail：lctslj0630@hotmail．com
通讯作者：李晓刚（1963～），男，教授，电话：010-62333975，E-mail：lixiaogang99@263．net。
